CROSSLINKABLE AND CROSSLINKED POLYMERIC MATERIALS

• US 20200087547A1
• Filed: 12/19/2017
• Published: 03/19/2020
• Est. Priority Date: 12/22/2016
• Status: Active Grant

• Current Assignee: Solventum Intellectual Properties Company (Solventum Corp.)
• Original Assignee: 3M Innovative Properties Company (3M Company)
• Inventors: Roscoe, Stephen B., Gopalakrishnan, Deepti, Gryska, Stefan H., Griesgraber, George W., Yurt, Serkan, Fansler, Duane D., Lewandowski, Kevin M., Chatterjee, Joon, Lee, Hae-Seung Harry, Gaddam, Babu N.
• Granted Patent: US 10,640,686 B2
• Time in Patent Office: Days
• CPC Class Codes: C08F 222/10 Esters
• CPC Class Codes: C08F 2438/03 Use of a di- or tri-thiocarbonylthio compound, e.g. di- or tri-thioester, di- or tri-thiocarbamate, or a xanthate as chain transfer agent, e.g . Reversible Addition Fragmentation chain Transfer [RAFT] or Macromolecular Design via Interchange of Xanthates [MADIX]
• CPC Class Codes: C08F 265/06 Polymerisation of acrylate or methacrylate esters on to polymers thereof
• CPC Class Codes: C08F 287/00 Macromolecular compounds obtained by polymerising monomers on to block polymers
• CPC Class Codes: C09J 11/08 Macromolecular additives
• CPC Class Codes: C09J 2301/408 additives as essential feature of the adhesive layer
• CPC Class Codes: C09J 2301/414 presence of a copolymer
• CPC Class Codes: C09J 2451/00 Presence of graft polymer
• CPC Class Codes: C09J 4/06 Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond in combination with a macromolecular compound other than an unsaturated polymer of groups C09J159/00 - C09J187/00
• CPC Class Codes: C09J 7/387 Block-copolymers

Abstract

Crosslinkable compositions are provided that contain a) a polymeric material having at least two terminal dithiocarbamate groups or two terminal dithiocarbonate groups and b) a monomer composition that includes at least a crosslinking monomer having two or more ethylenically unsaturated groups. The polymeric materials in the crosslinkable compositions undergo chain extension and crosslinking reactions when exposed to actinic radiation in the ultraviolet region of the electromagnetic spectrum. Additionally, crosslinked compositions, articles that contain the crosslinkable compositions or the crosslinked compositions, and methods of making the articles are provided.

Claims

1. A crosslinkable composition comprising:

a) a polymeric material of Formula (I)

2. The crosslinkable composition of claim 1, wherein y is equal to 1 and the polymeric material of Formula (I) is an elastomeric material.

3. The crosslinkable composition of claim 1, wherein the crosslinkable composition comprises 5 to 99.99 weight percent polymeric material of Formula (I), 0.01 to 20 weight percent crosslinking monomer having at least two ethylenically unsaturated groups, and 2) 0 to 95 weight percent monomer having a single ethylenically unsaturated group, wherein each amount is based on a total weight of polymerized and polymerizable material.

4. The crosslinkable composition of claim 1, wherein the polymeric material of Formula (I) has a weight average molecular weight in a range of 10,000 Daltons to 5 million Daltons.

5. The crosslinkable composition of claim 1, wherein the crosslinkable composition further comprises a photoinitiator.

6. The crosslinkable composition of claim 5, wherein the photoinitiator is of Formula (V).

7. The crosslinkable composition of claim 5, wherein the photoinitiator is not of Formula (V).

8. The crosslinkable composition of claim 1, wherein the crosslinking monomer has two or more (meth)acryloyl groups.

9. A crosslinked composition comprising the polymerized product of a crosslinkable composition of claim 1.

10. The crosslinked composition of claim 9, wherein the crosslinked composition further comprises a tackifier.

11. The crosslinked composition of claim 9, wherein the crosslinked composition is a pressure-sensitive adhesive composition.

12. An article comprising:

a first substrate; and

a crosslinked composition layer positioned adjacent to the first substrate, the crosslinked composition layer comprising the crosslinked composition of claim 9.

13. A method of making an article, the method comprising:

providing a first substrate;

applying a crosslinkable composition layer adjacent to the substrate, the crosslinkable composition layer comprising the crosslinkable composition of claim 1;

exposing the crosslinkable composition layer to actinic radiation to form a crosslinked composition layer, wherein the actinic radiation comprises ultraviolet radiation.

14. The method of claim 13, wherein the substrate is in the form of a polymeric web.

15. The method of claim 13 or 111, wherein the actinic radiation is from a light emitting diode.